This study was conducted to identify methods that have been used in the repair and rehabilitation of concrete dams. Information was obtained through literary searches, discussions with project personnel, and visits to project sites. Each case history includes a background of the project, the deficiency that necessitated repair or rehabilitation, and descriptions of materials and methods used in the repair or rehabilitation. When available, the cost of the repair project and the performance of the repair to date have been included. Case histories included in this report cover a range of deficiencies in concrete structures, including cracking, spalling, erosion, leakage, inadequate PMF capacity, expansion resulting from alkali-aggregate reaction, instability, and insufficient storage capacity.
" This monograph describes how a failed state in 2030 may impact the United States and the global economy. It also identifies critical capabilities and technologies the US Air Force should have to respond to a failed state, especially one of vital interest to the United States and one on the cusp of a civil war. Nation-states can fail for a myriad of reasons: cultural or religious conflict, a broken social contract between the government and the governed, a catastrophic natural disaster, financial collapse, war and so forth. Nigeria with its vast oil wealth, large population, and strategic position in Africa and the global economy can, if it fails disproportionately affect the United States and the global economy. Nigeria, like many nations in Africa, gained independence from the United Kingdom in 1960. It is the most populous country in Africa and will have nearly 250 million people by 2030. In its relatively short modern history, Nigeria has survived five military coups as well as separatist and religious wars, is mired in an active armed insurgency, is suffering from disastrous ecological conditions in its Niger Delta region, and is fighting one of the modern world's worst legacies of political and economic corruption. A nation with more than 350 ethnic groups, 250 languages, and three distinct religious affiliations--Christian, Islamic, and animist Nigeria's 135 million people today are anything but homogenous. Of Nigeria's 36 states, 12 are Islamic and under the strong and growing influence of the Sokoto caliphate. While religious and ethnic violence are commonplace, the federal government has managed to strike a tenuous balance among the disparate religious and ethnic factions. With such demographics, Nigeria's failure would be akin to a piece of fine china dropped on a tile floor--it would simply shatter into potentially hundreds of pieces."--DTIC abstract.
Addressing a field that has been dominated by astronomers, physicists, engineers, and computer scientists, the contributors to this collection raise questions that may have been overlooked by physical scientists about the ease of establishing meaningful communication with an extraterrestrial intelligence. These scholars are grappling with some of the enormous challenges that will face humanity if an information-rich signal emanating from another world is detected. By drawing on issues at the core of contemporary archaeology and anthropology, we can be much better prepared for contact with an extraterrestrial civilization, should that day ever come.
Force Structure, Tactics, and Modernization of the Russian Ground Forces The mighty Soviet Army is no more. The feckless Russian Army that stumbled into Chechnya is no more. Today's Russian Army is modern, better manned, better equipped and designed for maneuver combat under nuclear-threatened conditions. This is your source for the tactics, equipment, force structure and theoretical underpinnings of a major Eurasian power. Here's what the experts are saying: "A superb baseline study for understanding how and why the modern Russian Army functions as it does. Essential for specialist and generalist alike." -Colonel (Ret) David M. Glantz, foremost Western author on the Soviet Union in World War II and Editor of The Journal of Slavic Military Studies. "Congratulations to Les Grau and Chuck Bartles on filling a gap which has yawned steadily wider since the end of the USSR. Their book addresses evolving Russian views on war, including the blurring of its nature and levels, and the consequent Russian approaches to the Ground Forces' force structuring, manning, equipping, and tactics. Confidence is conferred on the validity of their arguments and conclusions by copious footnoting, mostly from an impressive array of primary sources. It is this firm grounding in Russian military writings, coupled with the authors' understanding of war and the Russian way of thinking about it, that imparts such an authoritative tone to this impressive work." -Charles Dick, former Director of the Combat Studies Research Centre, Senior Fellow at the Defence Academy of the United Kingdom, author of the 1991 British Army Field Manual, Volume 2, A Treatise on Soviet Operational Art and author of From Victory to Stalemate The Western Front, Summer 1944 and From Defeat to Victory, The Eastern Front, Summer 1944. "Dr. Lester Grau's and Chuck Bartles' professional research on the Russian Armed Forces is widely read throughout the world and especially in Russia. Russia's Armed Forces have changed much since the large-scale reforms of 2008, which brought the Russian Army to the level of the world's other leading armies. The speed of reform combined with limited information about their core mechanisms represented a difficult challenge to the authors. They have done a great job and created a book which could be called an encyclopedia of the modern armed forces of Russia. They used their wisdom and talents to explore vital elements of the Russian military machine: the system of recruitment and training, structure of units of different levels, methods and tactics in defense and offence and even such little-known fields as the Arctic forces and the latest Russian combat robotics." -Dr. Vadim Kozyulin, Professor of Military Science and Project Director, Project on Asian Security, Emerging Technologies and Global Security Project PIR Center, Moscow. "Probably the best book on the Russian Armed Forces published in North America during the past ten years. A must read for all analysts and professionals following Russian affairs. A reliable account of the strong and weak aspects of the Russian Army. Provides the first look on what the Russian Ministry of Defense learned from best Western practices and then applied them on Russian soil." -Ruslan Pukhov, Director of the Moscow-based Centre for the Analysis of Strategies and Technologies (CAST) and member of the Public Council of the Russian Federation Ministry of Defense. Author of Brothers Armed: Military Aspects of the Crisis in Ukraine, Russia's New Army, and The Tanks of August.
One of the most vexing issues that has faced the international community since the end of the Cold War has been the use of force by the United Nations peacekeeping forces. UN intervention in civil wars, as in Somalia, Bosnia and Herzegovina, and Rwanda, has thrown into stark relief the difficulty of peacekeepers operating in situations where consent to their presence and activities is fragile or incomplete and where there is little peace to keep. Complex questions arise in these circumstances. When and how should peacekeepers use force to protect themselves, to protect their mission, or, most troublingly, to ensure compliance by recalcitrant parties with peace accords? Is a peace enforcement role for peacekeepers possible or is this simply war by another name? Is there a grey zone between peacekeeping and peace enforcement? Trevor Findlay reveals the history of the use of force by UN peacekeepers from Sinai in the 1950s to Haiti in the 1990s. He untangles the arguments about the use of force in peace operations and sets these within the broader context of military doctrine and practice. Drawing on these insights the author examines proposals for future conduct of UN operations, including the formulation of UN peacekeeping doctrine and the establishment of a UN rapid reaction force.
